How to Resize Signature for Online Forms (SSC, IBPS, UPSC)

Guides · Image · Updated 2026

One of the most common reasons online exam forms get stuck at the “upload signature” step is that the file size or dimensions are off. SSC, IBPS, and UPSC have strict rules — a signature file might need to be 140×60 pixels and between 10 KB and 20 KB. If your scanned signature doesn’t meet both criteria, the portal will reject it. This guide shows you how to get it exactly right every time, using nothing but a smartphone scan and a free browser tool.

Why exam portals are so strict about signature specs

Signatures are embedded into admit cards and official forms. The dimensions must be consistent so that the printed admit card doesn’t show a stretched or blurry sign. The file size window is equally important: too small, and the signature may appear jagged; too large, and the system can’t process the uploaded file quickly. Both extremes lead to rejection.

SSC Signature: 140×60 px, 10–20 KB
IBPS Signature: 140×60 px, 10–20 KB
UPSC Photo (example): 350×350 px, 20–300 KB

Step-by-step: resize your signature to spec

Open the Signature Resizer tool.
Upload your signature — you can snap a photo of a pen‑on‑paper signature with your phone and crop it to the signature area using any basic photo editor. (Pro tip: increase contrast so the background is pure white.)
Select the exam preset from the dropdown (e.g., “SSC Signature”). The tool fills in the exact width, height, and KB min‑max automatically. You can still tweak these if the official notification differs.
Click Resize & Compress. The tool first scales the image to the precise pixel dimensions (adding a white letterbox if the aspect ratio doesn’t match) and then searches for the JPEG quality that lands inside the KB window.
If the output shows a green “within range” tick, download the file. If you get a yellow warning, try adjusting the min‑max numbers slightly within the portal’s allowed limits and re‑run.

💡 Tip: Always check the latest official notification on the exam website. Some boards update the pixel dimensions or KB limits each year, and the tool’s presets are editable for that very reason.

What to do if the signature still gets rejected

Sometimes the problem isn’t the file size but the visual quality. If your signature looks too faint, darken it using a simple image editor before uploading to the resizer. Also, ensure the background is absolutely white (not off‑white) because some portals detect coloured backgrounds and flag them as non‑compliant.

Frequently Asked Questions

Can I use a digital signature drawn on a tablet?

Yes. Save the signature as a JPEG with a white background and upload it to the resizer. As long as the final dimensions and KB match the requirements, it will work.

Why does my 10 KB file still get rejected even when the size is correct?

The file may be in PNG format or have metadata. Our tool always outputs a clean JPEG without extra EXIF data, which resolves most portal acceptance issues.

How do I know the official specs for a particular exam?

Look for the “Instructions for Uploading Photograph & Signature” section in the exam notification PDF. The tool’s presets are based on recent notifications, but always cross‑check.

Can I use the same signature file for multiple exams?

Only if the exams share the exact same pixel dimensions and KB range. Different boards have different specs, so you’ll likely need a separate file for each one.

Is it free and private?

Yes — the tool runs entirely in your browser, free, with no sign‑up and nothing uploaded to a server.

Try the Signature Resizer